Display device and method of driving the same

Abstract

A display device includes a driver circuit that controls so that an electric charge accumulation and a voltage detection / supply start simultaneously for a pixel circuit in a first row in the matrix and a pixel circuit in a second row in a matrix and adjacent to the pixel circuit in the first row in one direction along a column, and that controls so that the electric charge accumulation and the voltage detection / supply end simultaneously for the pixel circuit in the first row and a pixel circuit in a third row and adjacent to the pixel circuit in the first row in another direction along the column.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a display device including plural pixel circuits arranged in a matrix, each pixel circuit having a light-emitting element that emits light with a luminance corresponding to an amount of injected electric current and a transistor element that controls the amount of electric current flowing through the light-emitting element, the display device being formed to accumulate electric charges up to a predetermined capacitor and to detect / supply a voltage corresponding to a driving threshold voltage between a gate and a source of the transistor using the accumulated electric charges prior to the light emission by the light-emitting element. The present invention also relates to a method of driving such display device.[0003]2. Description of the Related Art[0004]An organic light-emitting display device which employs an organic light-emitting diode (OLED) that emits light by itself is the most app...

AI Technical Summary

Benefits of technology

The present invention relates to a display device and a method of driving it. The display device includes multiple pixel circuits arranged in a matrix, each containing a light-emitting element and a transistor for controlling the electric current flowing through the light-emitting element. The pixel circuits perform an electric charge accumulation operation prior to emitting light, and a voltage detecting / supplying operation using the accumulated electric charges to detect and supply a voltage corresponding to the driving threshold voltage of the transistor. The driver circuit controls the timing of detection and supply of the voltage to ensure simultaneous starting of the electric charge accumulation and voltage detection / supply for adjacent pixel circuits in one direction or another. This method helps to reduce the variation in the time required for the electric charge accumulation and voltage detection / supply, resulting in a more stable display image quality.

Problems solved by technology

The former, though being advantageous for its simple structure, is not appropriate for realization of large high-resolution display devices.

The conventional display device with the OLEDs, however, has a large number of wirings extending from the driver circuit 112 as an interconnection structure, whereby the improvement in aperture ratio of each pixel is difficult to achieve.

Thus, the interconnection structure occupies extremely large area on the array substrate.

Then the improvement in aperture ratio is difficult to achieve.

However, such structure creates another problem, i.e., the level of the driving threshold voltage supplied by the driver element 102 fluctuates, for example, to deteriorate the display image quality.

Images